Li
F
Be
B
O
Li
F
Be
B
O
Na
Cl
Mg
Al
S
Na
Cl
Mg
Al
S
K
Br
Ca
Ga
Se
K
Br
Ca
Ga
Se
Rb
I
Sr
In
Te
Rb
I
Sr
In
Te
90
116
152
166
134
154
196
211
59
90
86
130
114
174
132
192
41
82
68
118
76
126
94
144
71
73
119
126
99
102
167
170
114
116
182
184
133
135
206
207
+
3+
2−
−
2+
+
3+
2−
−
2+
+
3+
2−
−
2+
+
3+
2−
−
2+
Sizes of atoms and their ions in pm
Group 1
Group 2
Group 13
Group 16
Group 17